Mechanical support for insulators



April 1948. E. POHLE MECHANICAL SUPPORT FOR INSULATORS Filed Sept 26,1945 INVEN TOR Patented Apr. 6, 1948 MECHANICAL SUPPORT FOR INSULATORSEric Pohle, Clifton, N. J., assignor to Allen B. Du Mont Laboratories,Inc., Passaic, N. J., a corporation of Delaware Application September26, 1945, Serial No. 618,654

' 1 Claim. 1

This invention relates to a device for mechanically supportinginsulators by means of metal in vacuum tubes without using cement orfusing the insulators to the metal. The insulators may, for example, betubes that are supported at each end by metallic supports extending intothese ends.

While the invention is particularly suitable for mechanically supportinginsulators in vacuum tubes without using cement or fusing the metal tothe insulators, it is not restricted to this particular use.

In carrying out the invention, metal holders or supports are providedfor the insulator, which is preferably tubular, in such a manner thatthese fasteners or supports can be readily inserted into the insulatorsand attached to the same in such a manner that the insulators aresecurely held in place without danger of becoming loose or beingdetached.

The invention may be understood from the description in connection withthe accompanying drawing, in which:

Fig. 1 is a longitudinal section through an embodiment of the inventionand Fig, 2 is a section along the line 2-2 of Fig. 1.

In the drawing, reference characters 3 and 4 indicate metal supportsinthe form of straight rods that may be used for supporting the tube ofinsulating material 5 by having the ends of these metal rods insertedsome distance into the ends of the insulating tube 5.

Metallic fastening members 6 and I are provided at each end of the tube5 and overlap at least the ends of the rods 3 and l and these ends are 2then inserted into the insulating tube 5 the desired distance and thelarge end of the members 6 and 1 are slipped over the ends of the tube5.

In order to clamp the tube 5 on the ends of the rods 3 and 4 pressure isapplied to opposite ends of each one of the fastening members 6 and lsufficient to crimp the same as indicated at 12 for the fastening member6 and frictionally hold them in place. This may be done, for example, bymeans of pliers the jaws of which are applied to the opposite ends ofthe members 6 and I. This crimping securely clamps the large ends of thefastening members 6 and 1 to the corresponding ends of the tube 5,thereby securely clamping these ends to the metal rods or supports 3 and4.

The rods 3 and 4 are thereby in position with respect to each other andare insulated from each other.

What is claimed is:

A device for supporting a hollow cylindrical insulator, which comprisesa cylindrical metal rod having its end fitting in the end of said hollowinsulator and terminating in said insulator and a short hollow metalfastener on said rod having The following references are oi. record inthe file of this patent:

UNITED STATES PATENTS a portion of these ends into which the metal rodsNumber Name Date or supports 3 and I extend. 482,872 Lee Sept. 20, 1892The metallic members 6 nd l are provided at 777,215 Meston Dec. 13, 1904their ends, into which the tube 5 is inserted, with 829,416 McGill Aug.28, 1906 openings sufflciently large to eceive the tube 5, 946,779Hubbel! Jan. 18, 1910 the ends of tube 5 having close fits around the 401,031,453 Lange et al. July 2, 1912 rods 3 and 4. 1,035,212 McCarthyAug. 13, 1912 Flanges 8 and 9 that are preferably curved are 1,080,713Mead Dec. 9, 1913 provided at the ends of the members 6 and I, and1,651,783 Trogner Dec. 6, 1927 enlarged rings In and II are provided,respective- 1,699,744 Marbury Jan. 22, 1929 1y. on these fasteningmembers. 1,725,122 Aalb'org Aug. 20, 1929 The fastening members 8 and Iare placed near 2,048,504 Hawley July 21, 1938

